package com.inspur.security.cbb3.kms.aspect;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.inspur.security.cbb3.kms.annotation.SysLog;
import com.inspur.security.cbb3.kms.enums.BusinessStatus;
import com.inspur.security.cbb3.kms.syslog.po.SysLogBean;
import com.inspur.security.cbb3.kms.syslog.service.SysLogService;
import com.inspur.security.cbb3.kms.sysuser.po.SysUserBean;
import com.inspur.security.cbb3.kms.sysuser.service.SysUserService;
import com.inspur.security.cbb3.kms.utils.IpUtil;
import com.inspur.security.cbb3.kms.utils.Result;
import com.inspur.security.cbb3.kms.utils.ServletUtil;
import org.apache.commons.lang3.StringUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.util.ReflectionUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * 操作日志记录处理
 *
 * @author ljccccc
 */
@Aspect
@Component
public class LogAspect {
    private static final Logger log = LoggerFactory.getLogger(LogAspect.class);

    @Autowired
    private SysLogService sysLogService;

    @Autowired
    private SysUserService sysUserService;

    /**
     * 配置织入点
     */
    @Pointcut("@annotation(com.inspur.security.cbb3.kms.annotation.SysLog)")
    public void logPointCut() {
        // 无需内容
    }

    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "logPointCut()", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {
        handleLog(joinPoint, null, jsonResult);
    }

    /**
     * 拦截异常操作
     *
     * @param joinPoint 切点
     * @param e         异常
     */
    @AfterThrowing(value = "logPointCut()", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Exception e) {
        handleLog(joinPoint, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, final Exception e, Object jsonResult) {
        try {
            // 获得注解
            SysLog controllerLog = getAnnotationLog(joinPoint);
            if (controllerLog == null) {
                return;
            }

            // *========数据库日志=========*//
            SysLogBean operLog = new SysLogBean();
            operLog.setStatus(BusinessStatus.SUCCESS.ordinal());
            // 请求的地址
            String ip = IpUtil.getRemoteHost(ServletUtil.getRequest());
            operLog.setOperIp(ip);
            if (controllerLog.isSaveResponseData() && jsonResult != null) {
                // 返回参数
                ObjectMapper mapper = new ObjectMapper();
                operLog.setJsonResult(mapper.writeValueAsString(jsonResult));
            }

            operLog.setOperUrl(ServletUtil.getRequest().getRequestURI());

            SysUserBean loginUser = sysUserService.findLoginSysUser();
            if (loginUser != null) {
                operLog.setOperName(loginUser.getUserName());
            }

            if (e != null) {
                operLog.setStatus(BusinessStatus.FAIL.ordinal());
                operLog.setErrorMsg(StringUtils.substring(e.getMessage(), 0, 2000));
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            operLog.setRequestMethod(ServletUtil.getRequest().getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerLog, operLog);
            // 保存数据库
            sysLogService.add(operLog);
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param log     日志
     * @param operLog 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, SysLog log, SysLogBean operLog) throws Exception {
        // 设置action动作
        operLog.setBusinessType(log.businessType().ordinal());
        // 设置标题
        operLog.setTitle(log.title());
        // 设置操作人类别
        operLog.setOperatorType(log.operatorType().ordinal());
        // 是否需要保存request，参数和值
        if (log.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog);
        }
    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param operLog 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, SysLogBean operLog) throws Exception {
        String requestMethod = operLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            // 参数名
            String[] argNames = ((MethodSignature) joinPoint.getSignature()).getParameterNames();
            Object[] args = joinPoint.getArgs();
            List<Object> argObjs = Arrays.asList(args);
            List<Object> newArgObjs = new ArrayList<>(argObjs);
            Class[] classes = ((MethodSignature) joinPoint.getSignature()).getParameterTypes();

            for (int i = argNames.length - 1; i >= 0; i--) {
                try {
                    if ("password".equalsIgnoreCase(argNames[i])) {
                        newArgObjs.remove(i);
                    } else if (classes[i] != String.class && classes[i].getDeclaredField("password") != null) {
                        Object o = newArgObjs.get(i);
                        Field pwd = classes[i].getDeclaredField("password");
                        ReflectionUtils.makeAccessible(pwd);
                        pwd.set(o, null);
                        newArgObjs.set(i, o);
                    }
                } catch (NoSuchFieldException e) {
                    //没有字段,正常

                }
            }

            String params = argsArrayToString(newArgObjs.toArray());
            operLog.setOperParam(StringUtils.substring(params, 0, 2000));
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private SysLog getAnnotationLog(JoinPoint joinPoint) throws Exception {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();

        if (method != null) {
            return method.getAnnotation(SysLog.class);
        }
        return null;
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        ObjectMapper mapper = new ObjectMapper();
        StringBuffer params = new StringBuffer();
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                if (!isFilterObject(paramsArray[i])) {
                    try {
                        params.append(mapper.writeValueAsString(paramsArray[i]));
                    } catch (Exception e) {
                    }
                }
            }
        }
        return params.toString().trim();
    }

    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    public boolean isFilterObject(final Object o) {
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse;
    }
}
